Tubular heat exchanger

FIELD: mechanics.

SUBSTANCE: invention relates to heat exchangers that can be used in whatever heat exchange processes. The proposed heat exchanger comprises a cylindrical housing separated by inner crosswise baffles into a heat exchange chamber and a prechamber. One of the baffles is arranged at the inlet of pipe flow, the second baffle separated the prechamber and heat exchange chamber, the third baffle is an end piece that closes the heat exchange chamber. The housing accommodates three types of heat exchange pipes, namely, the main pipes of direct flows that pass through all baffles and pipes of direct and return flows with their ends, arranged at the heat exchanger outlet, interconnected. The prechamber main pipes of direct flows feature orifices arranged at a distance of half the pipe diametre from the baffle at the pipe flow inlet.

EFFECT: preservation of vacuum-suction effect power, increased fraction of return-recirculation part of flow, increased heating or cooling.

3 cl, 2 dwg

 

The invention relates to tubular heat exchangers, designed for heat exchange between the heated (cooled) environment and heat(cold)media through the dividing wall of the pipe, where one is served in a closed pipe, the other in a closed annulus. Can be used in chemical, petrochemical, gas, heat and power and other industries, and individual companies that use heat exchangers.

Known counterparts - single shell-and-tube heat exchangers are described, for example, in the work of Grigoriev V.A., Calaca T.A., V.S. Sokolov and Temkina P.M. "Quick reference heat exchange devices" edited by Lebedev P.D., Gosenergoizdat, 1962, p.84-86, 3.1, comprising a cylindrical shell (case) placed inside the pipe heater, consisting of a longitudinally installed pipes, welded in two transverse pipe walls, bonded to the inner surface of cylindrical shells. In a sealed chamber formed by two walls and a cylindrical shell, welded to the two side fitting supply (and output) of the product from the tube(th) space(a).

The essence of the one-way (for pipe space) of the heat exchanger is as follows. One thread (one of Teploobmennik environments) - trumpet - p is given to the input pipe walls and is divided into streams, included in pipe stills. Then the jet move "pass" through the pipe space (across the length of the tube along the axis of the cylindrical body and extend beyond the second partition. Here streams merge again in the stream and removed from the cylindrical body. Thread the other environment, submitted to the case side - annulus, "washes" the walls of the tube bundles (tube bundle) outside them - annular space. As a result, when the flows of the two environments through the wall of the tubing is heat-exchange interaction, whereby one of the threads is heated, the other is cooled.

The lack of structures of analogues is a low rate of heat transfer is low, the difference between the temperatures of the incoming and outgoing flux transmitted through the pipe space (and therefore low heat load another annular flow ceteris paribus). This disadvantage is due to a short stay "pipe" flow in the heat exchanger, i.e. the duration of the heat-exchange interaction environments.

Solution, the closest about constructive signs to declared and adopted for the prototype, is a shell-and-tube heat exchanger according to the patent of Russian Federation №2145698, priority dated 21.04.1998,

Design single-pass shell-and-tube heat exchanger according to the patent of Russian Federation №245698 (in contrast to classical designs analogues) equipped with - supplemented by prechamber formed by introducing a cylindrical housing immediately behind the entrance of the pipe wall is still one continuous transverse partitions. Moreover, the newly introduced septum equipped chekhlova fittings in places of passage of the heat exchange tubes. (I.e. heat-exchange tubes are passed through chekhlova sockets additional partitions.) Enter the cooling medium in the annulus of the heat exchanger made through the hose attached to the prechamber. The output of the cooling medium through the fitting, welded near the output partitions. Shell-and-tube heat exchanger according to the patent of Russian Federation №2145698 is designed for cooling the gas flowing in the tube space with a high temperature by cooling water in the annular space.

The essence of the design of the prototype is that directed into the tube space of the cylindrical body, the cooling water is supplied via the hose into the settling chamber and then forced from the pre-chamber into the next annular compartment-heat-exchange chamber through the gaps between the heat exchange tubes and chekhlova nozzles. As the temperature of the cooled gas at a maximum at the inlet of the heat exchanger, i.e. on the contact surface side of the heat exchange tubes located in the prechamber, it is on the surface of this part of the tubes when VSC is a company of water may form a salt slurry (deposition of scale). The introduction of the pre-chamber and set gap between chekhlova pipes and heat exchanger tubes is implemented increased the speed of cooling water at the initial section of the heat exchanger. Moreover, the size of this plot is determined by the length chekhlova nozzles. Thus, the known solution allows to reduce the "peak" of the process load on the input section of the heat exchanger, i.e. to unload it, providing a more uniform wear design. (Higher speed cooling water undertake partial self-cleaning ash formed deposits.) Thus the heat balance of the heat exchanger as a whole, in comparison with bisformamide counterparts, apparently, is not changed.

The shortcoming of the prototype, as well as structures and analogues is the low rate of heat transfer is low, the temperature difference of the incoming and outgoing flow that is passed through the tube space.

This disadvantage is due to a short stay "pipe" flow in the heat exchanger, i.e. the duration of the heat-exchange interaction environments.

The aim of the invention is the achievement of increased differential (difference) temperature of inlet and outlet pipe flow is provided by conditional increase of the duration of flow in the heat exchanger h is the introduction of natural return and circulation of it.

This goal is achieved by the fact that in the known heat exchanger, comprising a cylindrical casing, separated by transverse partitions into the heat exchange chamber and the prechamber, one of these partitions placed at the entrance of the pipe flow, the second partition divides the chamber and the heat exchange chamber, the third is the end and closes the heat exchange chamber. In the building there are three types of heat-exchange tubes, namely, core tube direct flows, which carried through all walls and tubes of direct and return flows, the ends of which are located in the output side of the heat exchanger are connected, and in the prechamber into the main pipe straight threads with holes at a distance of polumetra tube from the wall at the entrance of the pipe flow. The connection of the ends of the tubes made in the form of bends in a U-shape (180°). The connection of the ends of the tubes are made by typing in their total output chamber formed additional partition.

The invention is illustrated by figure 1 and 2.

Figure 1 shows a longitudinal section of the heat exchanger with three kinds of heat-exchange tubes, where the ends of the tubes and return ends (same number) tubes direct flows are connected by bends in a U-shape (180°). In the main tubes direct flow in the settling chamber with holes.

Figure 2 - that is e, but the ends of the tubes of return flows and part of the tubes to direct streams introduced into a common chamber at the outlet of the heat exchanger (newly formed additional partition).

The design of the heat exchanger in removable-ange version consists of a cylindrical body 1 with flanges 2, connected to the flange 3 of the pipe system. In case 1 welded transverse partitions:

- inlet pipe flow partition 4;

- partition 5 between the chamber 6 and the heat exchange chamber 7;

- end wall 8 at the end of the heat exchange chamber 7;

- additional partition 9 (version 2), formed the total output of the camera 10. In the heat-exchange chamber 7 in the annular space of the heat exchanger is placed partitions 11 incomplete section (for lengthening the path of the annular flow). To enter the annular flow in a cylindrical housing 1 welded fitting 12 to output the fitting 13. In the housing 1 are also three types of heat-exchange tubes 14, 15 and 16. The main heat-exchange tubes 14 direct flow transit conducted through solid walls 4, 5, 8 and 9 (for option 2) and all of the cameras 6, 7 and 10 (for option 2). In the settling chamber 6, in the main tube 14 with holes 17 (located at a distance equal to half the diameter of the tube from the inlet septum 4). Heat-exchange tubes 15 - pipes and return flows. The number of tubes conventionally direct streams 16 and connected tubes of return flows 15 coincide. The ends of the tubes 15 and 16, located in the output side of the heat exchanger according to the variant of Figure 1, are connected to each other by bends in a U-shape (180°) - "rolls" 18. For option 2 the ends of the tubes 15 and 16 is introduced into the sealed chamber 10, formed an additional partition 9 and located at the exit of the housing 1 of the heat exchanger. (In the walls of the tubes 16 conditional direct flow, in contrast to the walls of the main tube 14 straight threads, holes 17 in the settling chamber 6 is not performed.)

The proposed design consists in the following. Pipe flow in the piping system through the connection flanges 2 and 3 in the housing 1 in front of the partition wall 4 is divided into separate streams - streams that are included in the main heat exchanger tube 14 direct flows. These streams pass through the main pipe 14 through chamber 6 and through the heat exchange chamber 7 formed by the partitions 5 and 8 (in the embodiment of figure 2 and through the chamber 10). On the walls of the main tube 14 in the chamber 7 pipe threads interact with the annular flow moving along the annular space from the inlet fitting 12 to the outlet 13 of the annular path of flow is lengthened by installing partitions 11 is a partial cross-section). In the heat of interaction streams, having different ones is the temperature, one stream is heated (output), the other (the stream) is becoming a more cold. Thus, pipe flow, passing the output partition 8 (option 1) or 9 (version 2), has a modified temperature. When traffic flows on the main tube 14 on the inner surface of the primary sections (tubes 14) having a zone of reduced pressure - zone conventional vacuum suction effect. Openings 17 in the wall of the main tube 14 zone conventional vacuum suction effects of each tube are United in a common space - an internal volume of the pre-chamber 6.

At the same time by dividing the total input flow streams-streams that fall into the main heat exchange tubes 14, part of his "walks" in the tube 16, pass from the settling chamber 6, and then heat-exchange chamber 7 ("passing it the appropriate heating or cooling) and "rolls" 18 (option 1) or via the output of the camera 10 (option 2) is sent to the tube 15 return flows. Again following the heat exchange chamber 7 (only in reverse), more "podagricus" or achladies, back-and-recycle stream enters the settling chamber 6. Under the action of the vacuum suction effect is the product of a reciprocating recirculation flow "sucked" into the holes 17 of the main tube 14 direct flows, diluting-mixed with straight threads is thereby increasing the heat transfer results of interaction (one heat exchange apparatus). (Optimal number and diameter of tubes of direct and return flows, the number and diameter of holes in the walls of the main pipe straight threads are selected experimentally.)

The proposed design is introduced naturally-forced flow (return) required share of pipe flow back into the prechamber with the conventional vacuum suction effect, which used part of the mechanical energy of the same thread. The required proportion of stream constructive means "rotated" in the opposite direction. Moreover, the energy of the vacuum suction effect on the proposed solution is not consumed on a long way back transportation share of pipe flow back into the prechamber. All the energy of a conventional vacuum suction expended only on the transfer of the product through openings in the walls of the main heat-exchange tubes in the main stream.

The percentage of back-and-recirculating part in the total volume of the flow pipe flow is increased through the implementation of natural bezmasenoj recirculation enlarged portion of the pipe flow in the heat exchanger, an increased differential (difference) temperature of inlet and outlet pipe thread. At the same time, the output stream is stored high pressure (high pressure flow, because the flow rates of the heat exchanger little.

The change in the value of the output of the second temperature pipe flow only 5÷10%, increasing the specific heat load (on each machine), in a simplified representation allows to exclude the same proportion of vehicles from some newly designed and existing technological schemes that, given the reduction in capital costs, maintenance costs and repair, technically and economically.

1. A heat exchanger comprising a cylindrical casing, separated by transverse partitions into the heat exchange chamber and the prechamber, wherein one of the said partitions placed at the entrance of the pipe flow, the second partition divides the chamber and the heat exchange chamber, the third is the end and closes the heat exchange chamber, while the case contains three types of heat-exchange tubes, namely the main tube direct flows, which carried through all walls and tubes of direct and return flows, the ends of which are located in the output side of the heat exchanger are connected, and in the prechamber into the main pipe straight threads with holes at a distance of polumetra tube from the wall at the entrance of the pipe flow.

2. The heat exchanger according to claim 1, characterized in that the connection of the ends of the tubes made in the form of bends in a U-shape (180°).

3. The heat exchanger according to claim 1, characterized in that the connection of the ends of the tubes made by entering them in General in the output chamber, created an additional partition.



 

Same patents:

Heat exchanger // 2358192

FIELD: heating.

SUBSTANCE: invention relates to the field of power engineering and is to find application in heat exchanger apparatus of low and high pressure feed heating systems of steam turbines, heat exchanger apparatus of heat supply systems designed to provide for water reheating due to steam condensation on the heat exchange surface tubes. Proposed is a heat exchanger composed of a housing with a nipple for steam inlet and steam condensate outlet, a tubular system, a water distribution chamber with an inlet, a turn and an outlet compartments with heated water inlet and outlet nipples. Before the nipple for heated water inlet into the heat exchanger a device is installed that reduces the flux passage and is connected to the water chamber turn compartment via a duct equipped with a control valve (valve gate).

EFFECT: improvement of the heat exchanger operational cost-efficiency due to provision for heated water recirculation and increase of the rate of its flow through the heat exchange surface tubes; the tube inside contamination intensity reduction and increase of heated water temperature at the heat exchanger inlet and outlet.

1 dwg

FIELD: heating.

SUBSTANCE: invention relates to energy industry and can be used in purge systems of the first and second circuits of a nuclear power plant. A heat exchanger comprises a vertical tube bundle, an upper support ring and a lower support ring inside a vertical case as well as a lower and an upper nipple of tube space heat carrier set on the case; the lower and upper tube bundle sections are connected to the respective supports and the latter are attached to the case. The lower and upper supports are made as vertical shells and attached to the case by the lower and upper end faces of the shells respectively, each nipple is set on the case opposite to the shell of the respective support and forms an annular chamber in respect to the case. Such design of the heat exchanger allows for moving the points of attaching the supports to the case away from the case welded seams joining the tube plates and the case for the required distance as well as reducing influence of the case seams on the supports to the allowable value.

EFFECT: reducing allowable influence of the case seams on the supports.

2 cl, 3 dwg

FIELD: heating.

SUBSTANCE: invention relates to energy industry and can be used in purge systems of the first and second circuits of a nuclear power plant. A heat exchanger of a nuclear power plant comprises a tube bundle placed inside a vertical case and enclosed by a vertical housing. The lower section of the housing is connected to the lower grid of the tube bundle. The housing is set in respect to the case so that to form a vertical peripheral cavity which is divided into the upper and lower chambers by a baffle. A support of the tube bundle is set inside the case and connected to it. The baffle is made as a shell with its lower end being connected to the support and a band with one its edge being connected to the shell and the other one - to the case. The nipples of tube space heat carrier are fitted on the case. One nipple is set opposite the upper chamber of the peripheral cavity and the other one - opposite the lower chamber.

EFFECT: reducing stresses in the baffle.

3 cl, 3 dwg

FIELD: heating.

SUBSTANCE: invention relates to energy industry and can be used in purge systems of the first and second circuits of a nuclear power plant. A tube bundle is mounted in the middle part of a case and forms a peripheral cavity; the bundle is made as heat exchanging tubes wound around a vertical holder, upper and lower horizontal grids connected to the respective holder ends and an outer vertical housing with its lower section being connected to the lower grid. The upper housing section can be moved lengthwise in respect to the upper grid. A supporting ring is mounted in the case horizontally to the cavity bridging and fixed at its inner wall. The ring is placed in the lower case part and is connected to the lower grid of the tube bundle. Such design of the heat exchanger results in the fact that the housing is constantly subject to a compression force which is compensated by the elasticity of the heat exchanging tubes enclosed by the housing. The housing is not subject to additional temperature stresses in varying duty modes of the heat exchanger.

EFFECT: reducing probability of the housing destruction and improving operational reliability of the process heat exchanger of a nuclear power plant.

2 cl, 2 dwg

FIELD: heating.

SUBSTANCE: invention relates to design of heat-exchange equipment. The heat exchanger consists of a cross-flow bundle of shaped tubes with a surface composed of conjugated circular cylinders of varied (larger and smaller) outer diameter and manifolds with tube plates. With in-line (corridor) arrangement pattern varied diameter front and rear parts of each tube sequentially alternate in the bundle longitudinal and cross rows; with trigonal (chequerwise) arrangement pattern it is the smaller diameter front part of the tubes in the bundle that is turned towards the flow. With any arrangement pattern the shell sides form longitudinal confuser-diffuser ducts of varied cross-section.

EFFECT: tubular surface heating capacity improvement, reduction of the heat exchanger weight and overall dimensions and decrease of the fabrication process metal intensity.

5 dwg

FIELD: heating.

SUBSTANCE: heat exchanging device contains case, in which there are primary and secondary contours, between which heat exchange takes place. In the primary connection between entrance connector and exit connector there is primary channel. The valve for controlling liquid flow through the primary channel is in the form of in-line valve, partially located in the case of the device. The valve is connected to coupling sleeve. The coupling sleeve and the valve are on opposite sides of the case.

EFFECT: design of compact heat exchanging device.

6 cl, 4 dwg

FIELD: metallurgy.

SUBSTANCE: group of inventions concerns manufacturing of alumina during the process of bauxite pulp leaching. Method includes heating of initial pulp during its movement in heat-exchanging pipes bundle of shell-and-tube heat exchanger, withdrawing from stream of heated leached pulp, its heating till specified final temperature in shell-and-tube heat exchanger by direct steam, fed from outside, cooling of heated leached pulp with withdrawing heat transport to the stream of initial pulp. Cooling of leached pulp is implemented at it movement in heat-exchanging pipe bundle, and heat transport from heated leached pulp to the stream of initial pulp is implemented by means of usage thermosyphon effect by means of buffer medium, in the capacity of which it is used steam and condensate of water steam. At that initial pulp is fed to condensation zone of thermosyphon, and leached pulp - into its evaporation zone. Facility (the first version) contains heat-exchanger with double horizontally - piped bundles, where evaporating and condensation tube banks are located in one body. Evaporating tube banks of heat-exchangers are connected sequentially to each other by coal slurry pipeline. Condensation tube banks of heat-exchangers are connected by coal slurry pipeline sequentially to each other. Outlet fitting of the last condensation tube banks is connected by coal slurry pipeline to inlet fitting of high-temperature shell-and-tube heater, outlet fitting of which is connected to coal slurry pipeline with inlet fitting of evaporating heat-exchanger tube bank. Facility (the second version) is outfitted by spaced by height shell-and-tube heat-exchangers with condensation tube banks for heating of initial pulp and shell-and-tube heat-exchangers with evaporating tube banks for cooling of leached pulp, arranged in pairs: the first in the same direction as pulp heat-exchanger with evaporating tube bank is connected to the last heat-exchanger with condensation tube bank, the second heat-exchanger with evaporating tube bank is connected to the last heat-exchanger with condensation tube bank, and all of following heat-exchangers are connected respectively. Inventions provide decreasing of costs, reduction of equipment overall dimensions.

EFFECT: costs decreasing, reduction of equipment overall dimensions.

5 cl, 7 dwg

Heat exchanger // 2341751

FIELD: power engineering.

SUBSTANCE: invention can be used in feed water heaters of thermal and nuclear power plants. Proposed heat exchanger consists of a shell inside which a central header and vertical tube platens connected with their ends to appropriate central header chambers are installed. At that each platen is made at least of one "П"-shaped section with transverse parts installed in the shell one above the other, and intermediate part wherein external tubes are installed longitudinally on the shell side, and internal tubes are located on the header side. Internal tubes of the intermediate section part are made with additional sections bent in the direction of central header and located between transverse parts of this section. In this case average tube length makes bigger in each platen, which leads to less number of tubes used in each platen, and therefore to velocity increase in tube and intertube spaces of platens and heat exchange intensification, which finally reduces heat exchanger specific amount of metal.

EFFECT: reducing thermal and hydraulic maldistributions in platens, which also improves platen heat exchange and reduces to a greater degree the heat exchanger specific amount of metal.

2 dwg

Heat exchanger // 2341750

FIELD: nuclear power engineering.

SUBSTANCE: invention can be used when designing air heat exchangers of emergency cooling systems and for passive heat discharge from reactor plants as well as when designing separators-superheaters of turbine plants of nuclear power plants. Heat exchanger consists of a shell wherein a ring-shaped bank of tubular platens is located. Platens are installed in such a way that they form openings between each other and are made in the shell cross section as bent to one side in the direction from central header to shell wall. Tubes of intermediate platen sections are located on the shell wall side and form therewith periphery channels wherein baffle plates are arranged in tiers. In openings there mounted transversally are vertical partitions connected with the appropriate baffle plates in each tier. In periphery channels each of the periphery flows after coming across the baffle plate is drawn back to clearances between tubes of intermediate platen section.

EFFECT: increase of hydraulic resistance of periphery channels, which increases air flow through intertube platen space and heat exchanger capacity.

2 cl, 4 dwg

Heat exchanger // 2341749

FIELD: nuclear power engineering.

SUBSTANCE: heat exchanger consists of a central header with a distributing and collecting chambers arranged in a shell and a ring-shaped bank of tubular platens with upper and lower sections arranged in the shell as well and connected with radial tube ends to the appropriate header chambers made, in plan view, as bent to one side in the direction from header to shell and communicating between each other along the tube space by means of appropriate middle platen sections; at that in each platen the upper and lower sections are connected to each other at least with one vertical tube spacer in the platen, which is connected with one of its ends to support-and-ring horizontal beam, and with the other end - with horizontal ring of platen spacer ring in the bank. Each vertical tube spacer in the platen is connected with support-and-ring horizontal beam by means of a hinge, and the above horizontal ring consists of horizontal plates throughout its length, each of which is installed so that it mates the adjacent plate.

EFFECT: providing free thermal tube elongation in each platen and constant pitch between platens, and avoiding extreme tube bank vibrations and local platen tube wear.

4 cl, 8 dwg

FIELD: heat power engineering.

SUBSTANCE: according to proposed method, inner pipe is fitted into outer pipe after shape-treatment of at least outer surface of inner pipe or inner surface of outer pipe, and after fitting inner pipe outer pipe, inner pipe is expanded to bring outer surface of inner pipe in tight contact with inner surface of outer pipe, and shape-treatment of surface forms at least one channel to reveal leakage between two pipes. Before fitting in pipes at least outer surface of inner pipe or inner surface of outer pipe is coated with layer of solder, for instance, tin, and inner pipe is expanded so that outer pipe also expands, and solder layer between inner and outer pipes is melted. Outer pipe is expanded so that melted layer of solder is forced out from space between inner and outer pipe at least intone channel to reveal leakage. Such heat exchange pipe contains assembly unit consisting of outer pipe and inner pipe fitted at tight contact in between and at least one channel to reveal leakage passing in contact surface and near the surface between inner and outer pipes. Thin film-like layer of solar material, such as tin, is provided in place of contact between inner and outer pipes which, owing to melting, connects with inner pipe and outer pipe, inner and outer pipes adjoining with displacement. Invention makes it possible to increase heat transfer to value equal to or practically equal to that of solid heat exchange pipe and channel to reveal leakage remains free from filling medium, thus providing accurate and reliable revealing of leakage.

EFFECT: improved reliability.

15 cl, 6 dwg

FIELD: heat power engineering, applicable in designing and production of heat exchangers with tube plates and in other branches of industry.

SUBSTANCE: according to the first modification, the shell-and-tube heat exchanger has a heat exchanger shell with connections for delivery and discharge of the medium with a lower pressure, it envelops the heat-exchanging tubes connected to the tube plate, distributor chamber separated by a partition into the inlet and outlet cavities and limited by the case with connection for delivery and discharge of the medium with a higher pressure, case cover and tube plate having a strengthening tie in the distributor chamber, the strengthening tie is made in the form of a stiffening tube fixed to the case cover of the distributor chamber and the tube plate. According to the second modification, the shell-and-tube heat exchanger has a heat exchanger shell with connections for delivery and discharge of the medium with a lower pressure, it envelops the heat-exchanging tubes connected to the tube plate, distributor chamber separated by a partition into the inlet and outlet cavities and limited by the case with connections for delivery and discharge of the medium with a higher pressure, case cover and tube plate having a strengthening tie in the distributor chamber, the strengthening tie is made in the form of a stiffening tube fixed to the case over of the distributor chamber and the tube plate, the strengthening tie in the form of a stiffening tube with the case cover and the tube plate has a through hole of a permanent or variable flow section. According to the third modification, the shell-and-tube heat exchanger has a heat exchanger shell with connections for delivery and discharge of the medium with a lower pressure, it envelops the heat-exchanging tubes connected to the tube plates, distributor chamber separated by a partition into the inlet and outlet cavities and limited by the case with connections for delivery and discharge of the medium with higher pressure and the tube plates, in the distributor chamber the tube plates are fixed to one another by a strengthening tie in the form of stiffening rod. According to the fourth modification, the shell-and-tube heat exchanger has a heat-exchanger shell with connections for delivery and discharge of the medium with a lower or pressure, it envelops the heat-exchanging tubes connected to the tube plates, distributor chamber separated by a partition into the inlet and outlet cavities and limited by the case with connections for delivery and discharge of the medium with a higher pressure and the tube plates, in the distributor chamber the tube plates are fixed to one another by a strengthening tie in the form of stiffening tube. According to the fifth modification, the shell-and-tube heat exchanger has a heat-exchanger shell with connections for delivery and discharge of the medium with a lower pressure, it envelops the heat-exchanging tubes connected to the tube plates, distributor chamber separated by a partition into the inlet and outlet cavities and limited by the case with connections for delivery and discharge of the medium with a higher pressure and the tube plates, in the distributor chamber the tube plates are fixed to one another by a strengthening tie in the form of a stiffening tube, the strengthening tie in the form of a stiffening tube with tube plates has a through hole of a permanent or variable flow section.

EFFECT: idle time, enhanced utilization factor of the heat exchanger, as well as enhanced strength of the structure in static and especially dynamic modes of operation.

5 dwg

FIELD: baking industry.

SUBSTANCE: proposed plant includes trap hood and heat exchange cooling unit connected with it and mounted under it; cooling unit includes jacket with pipe line located over its center. Heat exchange cooling unit is used for forced circulation of cold air between jacket and pipe line inside it directing the flow in required direction: in cold season outside air is delivered and at hot season air from floor areas is delivered.

EFFECT: simplified construction; enhanced ecology; saving of water.

1 dwg

FIELD: boiler installation technology.

SUBSTANCE: boiler installation has boiler provided with burners, hot-water heater, heat exchangers passing through boiler and hot water heater, economizer and heat exchanger with heat exchanger passing it through. All the units of boiler installation are fixed at the same platform. Case of hot-water heater has several shells; cavities among shells are intended for filling with air and feed water. Cavity intended for filling with feed water is included into feed water circuit between feed water pump and economizer. Cavity intended for filling with air is connected with burners and blower. Heat exchanger disposed inside boiler is made in form of spiral envelopes disposed coaxially. Each envelope is formed by heat-exchange tubes connected with feeding and receiving boards. Envelopes having smaller diameters are shifted to combustion chamber made in form of two sequentially disposed cavities. Heat-exchange tubes of heat exchanger are made to have two sections. Tubes of the first section are made to touch tubes from the second section. Tubes of the second section are put in spiral envelopes to form gaps between surfaces of envelopes.

EFFECT: reduced size and weight of boiler installation, steam boiler and heat exchanger.

18 cl, 13 dwg

FIELD: heat-exchange apparatus.

SUBSTANCE: air cooler comprises vortex heat exchangers, pipes of the vortex heat exchangers for flowing air to be cooled flows, swirlers, and actuator of purifying mechanisms. The actuator has hollow driving shaft mounted in the pipes and provided with a longitudinal groove throughout its length. The groove receives unmovable screw with a nut coupled with the bushing freely mounted on the shaft through a key. The brush holder with brushes are secured to the bushing. The outer side of the pipes of the vortex heat exchangers are provided with chutes for circulating a coolant. The vortex heat exchangers has a fining with a coefficient that varies according to the relationship where D is the diameter of the pipe, n is the number of chutes, and l is the chute width. The parameters vary in the following range: D = 50-800 mm and l = 20-50 mm. The chute height l1 =3-40 mm, the thickness of the pipe wall and the thickness of the chute wall

EFFECT: simplified structure and enhanced reliability.

5 cl, 7 dwg

FIELD: power engineering.

SUBSTANCE: heat exchanger comprises pipes with spiral-ring fins. The fins are provided with longitudinal slots. The pipes in the heat exchanger are arranged vertically.

EFFECT: enhanced efficiency.

3 dwg

FIELD: equipment for gas cooling and moisture condensing, particularly for atomic power plants.

SUBSTANCE: apparatus comprises shell and coiled tube arranged inside the shell. The shell includes three sections, wherein coiled tube is secured inside middle section. Middle section has oppositely located inlet and outlet pipes for medium circulating in tubes. Coiled tube is formed as straight horizontal tubes with adjacent ends connected through U-shaped branches arranged in removable end sections of the shell, wherein the branches are turned one relative another so that three-dimensional coiled tube mound around vertical axis in formed. The inlet and outlet pipes are arranged in end shell sections, wherein mounting planes thereof are parallel to longitudinal shell axis.

EFFECT: improved accessibility of check points and reduced time of heat-exchanger putting of operation.

3 cl, 3 dwg

FIELD: heat exchange.

SUBSTANCE: heat exchanger comprises housing with front and back supporting lags of different height, lens compensator, pipe bundle with branch pipes for supplying and discharging heat-transfer agent, and front water chamber with the baffle which divides the pipe bundle into two sections. One of the sections is provided with branch pipes for supplying and discharging fluid to be heated, and the other section defines the back water chamber. The lens compensator is mounted in the vicinity of the back water chamber, and back supporting lag of the housing is provided with the additional supporting unit and mounted on the housing upstream or downstream of the lens compensator.

EFFECT: improved heat exchange and enhanced reliability.

1 dwg

FIELD: heat exchange.

SUBSTANCE: heat exchanger comprises housing with front and back supporting lags of different height, lens compensator, pipe bundle with branch pipes for supplying and discharging heat-transfer agent, and front water chamber with the baffle which divides the pipe bundle into two sections. One of the sections is provided with branch pipes for supplying and discharging fluid to be heated, and the other section defines the back water chamber. The lens compensator is mounted in the vicinity of the back water chamber, and back supporting lag of the housing is provided with the additional supporting unit and mounted on the housing upstream or downstream of the lens compensator.

EFFECT: improved heat exchange and enhanced reliability.

1 dwg

FIELD: heat exchange apparatus.

SUBSTANCE: surface heat exchanger comprises casing provided with bearing lags, lens compensator, pipe bench with branch pipes for supplying and discharging heat-transfer agent, and front water chamber with the baffle that divides it into two sections. One of the sections is provided with the branch pipes for supplying and discharging of the fluid to be heated, and the other section defines the back water chamber. The pipe bench inside the housing is separated by the horizontal baffle provided with the by-pass port interposed between the lens compensator and back water chamber. The top and bottom sections of the pipe bench are separated with the vertical baffles arranged symmetrically to each other.

EFFECT: improved heat exchange and enhanced heat power and reliability.

1 dwg

Up!